Governor



Allg. y F. B. MORRISON A GOVERNOR Filed Malron 18, 192e 2 sheets-sheet 1 Aug. 30, 1927. 1,640,713

. `F.B.MQRRBON GOVERNOR I Filed March le, 192e 2 sheets-sheet 2 /N VEN TOR Patented Aug. 30, 1927.

UNITED STATES PATENT ofrFicE.

FRANK B. MORRISON, OF MARION, OHIO, ASSIGNOR TO THE POWER MANUFACTURING i COMPANY, OF MARION, OHIO, A CORPORATION OF OHIO. f

GOVERNOR.

*Application fuenarch 18, 192s. Vseran int-95,661.`

This invention relates to improvements in governors for internal-combustion engines. It finds practical value in yan engine winch in operation carries an intermittent load of given frequency duration and value. a state of things which obtains in the drilling of wells and the like. In that particular application I shall describe it. j In the accompanying drawings Fig. I is a view in side elevation, showing diagrammatically wellldrilling apparatus, in which in association with the engine shaft appears the governor in which my invention centers; Fig. II is a view to a larger scale showing in vertical section the governor.

Referring first to I, 2O indicates-the walkingbeam of the well-drilling apparatus. From one end, the right-hand end as here presented, the drilling tools are hung by the suspensory member 2l. The opposite left-hand end of the walking beam 20 is linked to a crank-arm 22 upon the shaft of a band wheel` 23. The band wheel is driven through belt 24 from engine shaft 25, and the engine shaft 25 will be understood to be the shaft of an internal combustion engine indicated at 26. The governor 27 is in Fig. I shownin association with the engine shaft and this governor is in detail shown in Fig. II. ,l

Shaft l of this,V governor is caused to rotate in unison with the engine shaft25, and to that end the two shafts may conveniently be connected by a sprocket-chain drive not shown. Manifestly when the two shafts are so'caused to rotate in unison the speed of rotation of shaft 1 of the governor will vary with the VVspeed of the engine shaft,

Rotation of shaft l effects rotation of the the drawing. Accordingly, as the wedge rises, ythe effective stroke of the plunger of the injection pump is shortened, and the quantity of fuel supplied per strokeV is diminished. flVith the engine then operating under a ccntinuing load, the tendency is to diminutionv of speed.

The vertically standing governor shaft 2 carries, rigid with itself, a collar 6, and upon collar 6 are mounted two oppositely placed, weighted bell-crank levers 8. The shaftv carries also a collar 7, movable longitudinally upon it, and the shaft is freelyvrotat* able within the collar. Springs 9 and 10, backed by a rigidly sustained block 11, bear from above upon collar 7, and underthe spring 4tension so afforded the collar 7 bears yupon the inner arms of the bell-crank levers 8.. The bell-crank levers 8 are so weighted and so arranged that under the centrifugal force brought to bear .by shaft rotation the free arms tend to separate, and in so doing to raise collar.7, against the tension of one orboth of springs 9 and 10. The collar 7 is linked to a lever l2, and lever 12 in turn is linked to wedge 5, and through such connected instrumentalities, rise of collar 7 effects a corresponding rise of wedgev 5, a

proportionate diminutionv in the lengthof the stroke of the pump plunger, Vand (other things being equal) a corresponding diminution in the quantity per stroke of fuel in-. jected into .theengine cylinder.

The invention lies inthe spring backing of collar 7'. A pluralityof springs is employed-in this instance,

two-and the.

springs come successively and cumulatively into play, as the collar 7 rises from its low* est position. When with such springbacking for collar 7 the engine is in service under a load which increases to a maximum and then immediately drops to a minimum- `as is the case in well-drilling operationstheresponse of the weights* to Acentrifugal force is retarded, andwithsuch retardation the responsey of the descending tool to grav-` ity is enjoyed in larger measure.

The number ofsp-rings may conveniently be two, as shown in the drawings. They are conveniently helical springs of unequal diameters, concentrically arranged about the axis of shaft rotation. One of them comes'into play before the other, and this is conveniently achieved by forming one of them longer than the other. And in this particular instance', the inner spring 9 is longer and lighter than the outer spring l0.

Consider, now, the conditions when an engine equipped with this improvement is used in drilling a well. The engine acts upon one end of a vertically swinging walk ing-beam, from the opposite end of which the drill is hung. The engine pulls its end of the beam downward, and in so doing` raises the drill. During this up stroke of the drill the load on the engine is greatest,

its speed is correspondingly low, and the light spring 9 is effective to hold the ce-ntrifugal governor collapsed and the wedge in its lowest position, where the stroke of the fuel-injection plunger is longest. Innnediately when the lowest point is reached in the downward swing of-that end of the walking beam to which the engine is attached, and the return upward swing begins, the load upon the engine falls to a minimum. But for my invention 'the governor would immediately become effective, to cut downv engine speed, and retard the swing of the beam. But it is most desirable that the beam be notso retarded; it is most desirable that the beam be free, and that the drill descend, in unrestrained response to gravity.

By providing a plurality of springs which come successively into play, the spreading weights must overcome the inertia of each spring newly subjected to compression, and in overcoming such inertia, the moving weights lose inertia of their own. The consequence and effect is that the swing of the weights is delayed, hence the speed of the engine is increased` due to a constant supply of fuel with a reduced load, and correspondingly the force of gravit-y is allowed to be effective for drilling.

The its normal governor functions in a manner, to render lthe supply of fuel in theY with a pressure pump for injecting the fuelY into the cylinder; but, manifestly, theY invention is applicable similarly to control the supply of fuel, whether Vto the carbure.- tor of a. gas engine, orto fuel-introducing means of any sort.

The effective tension of the springs 9 and l() may be made variable by making the backing block ll adjustable longitudinally of the shaft 2. This adjustability is' indi# cated in that the block 13, upon which the lock ll bears, is adapted to be screwed in'- direcand out of its mounting and in the tionof the axis of shaft 2,

l claim as my invention: "In apparatus for drilling bores in the earth the combination Aof a vertically swinging walking beam, a tool hung from the walking beam at one end and an internal,

combustion enginev operatively engaging the beam at its other end, said engine ibeing provided with a fuel control and with a centrifugal governor controlling such fuel control, and means for opposing thel centrifugal swing of the governor, such means presenting to the governor when inthe course of its swing an abrupt increase of resistance.

In testimony whereof I have hereunto set my hand. l

FRANK B. MQRRISON. 

